以结构构件的荷载效应S和抗力 R 两个变量来表达结构功能以及可以出现的状态(Z=g( R , S ) =R-S )是 Z> 0 时结构处于可靠状态, Z=0 时结构达到临界状态,即极限状态;Z< 0 时结构处于失效状态。
A.
正确
B.
错误
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举一反三
【单选题】China adopted the practice of( )in customs clearance following the establishment of a new clearance system for goods subject to inspection and quarantine on 1 January lst 2000.
A.
customs declaration before quarantine inspection
B.
customs declaration and quarantine inspection at the same time
【单选题】China adopted the practice of ( ) in customs clearance following the establishment of a new clearance system for goods subject to inspection and quarantine on January 1st 2000.
A.
customs declaration before quarantine inspection
B.
customs declaration and quarantine inspection at the same time
【单选题】(4) China adopted the practice of ( ) in customs clearance following the establishment of a new clearance system for goods subject to inspection and quarantine on January 1st 2000.
A.
customs declaration before quarantine inspection
B.
customs declaration and quarantine inspection at the same time
【单选题】China adopted the practice of ( ) in customs clearance following the establishment of a new clearance system for goods subject to inspection and quarantine om January 1st 2000.
A.
customs declaration before quarantine inspection
B.
customs declaration and quarantine inspection at the same time